Flight number record

DL 1854

Delta Air Lines · San Juan to New York

Route: SJU → JFK
Departs: 07:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1854, check with Delta Air Lines.

DL 1854 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 14 minutes early.

Set against the rest of the country, DL 1854's record is 17 points better than the US average of 77.6%. That gap is worth roughly 166 fewer late arrivals for every thousand flights.

On time

94.2%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

110 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

1.9%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 1854 flies

DL 1854 flies SJU to JFK without a single fixed slot. Its most common scheduled departure was 07:00, used on 245 of 365 flights, with 07:05 (55 flights) and 07:15 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:00245 flights67.1%
Departs 07:0555 flights15.1%
Departs 07:1553 flights14.5%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1854 runs 5 points better at 94.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1854 next to SJU to JFK

Every carrier on SJU to JFK combined arrived on time 79.3% of the time across 3,657 flights, so DL 1854 is 15 points ahead of it. Delta flew 1,104 flights on the same city pair under all its flight numbers, including this one, and those ran 88.8% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 13 points.

DL 1854 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1854	365	94.2%	110 min	0.82%	A+
All Delta Air Lines on SJU–JFK	1,104	88.8%	83 min	1.90%	A
All carriers on SJU–JFK	3,657	79.3%	77 min	2.68%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1854 quarter by quarter

Quarter by quarter DL 1854 held fairly steady: 91.3% in Jul–Sep 2025, 98.9% in Oct–Dec 2025, 89.7% in Jan–Mar 2026 and 96.7% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights91.3%
Oct–Dec 202592 flights98.9%
Jan–Mar 202690 flights89.7%
Apr–Jun 202691 flights96.7%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1854 ranged from 92.2% on Saturday to 98.1% on Friday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 1854 runs late

One category carries most of the weight here. Carrier accounts for 44% of the 2,318 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
44%
Late-arriving aircraft
40%
National Airspace System
9%
Extreme weather
8%

40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,318 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,318 delay minutes reported on DL 1854.

Cancellations are rare at 0.82%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 1.9% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 1,598 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

Every one of the 365 flights under DL 1854 in the data flew SJU to JFK. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 365 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking DL 1854

For a booking, DL 1854 has one of the better records a US domestic flight can show: 94.2% on time and 0.82% cancelled. That is a base rate, not a promise about any single day.

Where to go next

A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures